.container
  .content
    - 3.times do
      .roller
        - 8.times do
          .base
            .oval
              .oval.right
                .oval.right
                  .oval.right
                    .oval.right
              .oval.left
                .oval.left
                  .oval.left
                    .oval.left
                    
.caption
  %p Nothing is moving. Based on the original "Rollers" by <a href="http://www.ritsumei.ac.jp/~akitaoka/index-e.html">Akiyoshi</a>.